for anyone who is unfamiliar:
"A prepared guitar is a guitar that has had its timbre altered by placing various objects on or between the instrument's strings, including other extended techniques. This practice is sometimes called tabletop guitar, because many prepared guitarists do not hold the instrument in the usual manner, but instead place the guitar on a table to manipulate it. The idea of altering an instrument's timbre through the use of external objects has been applied to other instruments as well, most notably John Cage's prepared piano, which preceded the prepared guitar." (
https://en.wikipedia.org/wiki/Prepared_guitar)
I've been experimenting with this technique for quite some time now - manipulating the guitar's pickups (with a radio or perhaps a motor) create some of my favorite kinds of textures. scraping the strings with various scrap metal, as well as processing the signal with a feedback-loop mixer or other effects, generate some otherworldly sounds as well.
for any others here who play their electric guitar in this style, what are your favorite techniques for manipulating the strings/pickups, and what kinds of effects/other gear do you use to process the sound?